Mercurial > hg > nginx
diff src/event/modules/ngx_devpoll_module.c @ 36:c14d7232b11f
nginx-0.0.1-2002-12-23-09:29:22 import
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Mon, 23 Dec 2002 06:29:22 +0000 |
parents | |
children | 83fa61cd3d2f |
line wrap: on
line diff
new file mode 100644 --- /dev/null +++ b/src/event/modules/ngx_devpoll_module.c @@ -0,0 +1,318 @@ +/* + * Copyright (C) 2002 Igor Sysoev, http://sysoev.ru + */ + + +#include <ngx_config.h> +#include <ngx_core.h> +#include <ngx_types.h> +#include <ngx_log.h> +#include <ngx_connection.h> +#include <ngx_event.h> +#include <ngx_devpoll_module.h> + +#if (USE_DEVPOLL) && !(HAVE_DEVPOLL) +#error "/dev/poll is not supported on this platform" +#endif + + +/* should be per-thread */ +static int dp; +static struct pollfd *change_list, *event_list; +static int nchanges, nevents; + +static ngx_event_t timer_queue; +/* */ + + +int ngx_devpoll_init(int max_connections, ngx_log_t *log) +{ + int size; + + size = sizeof(struct pollfd) * 512; + nchanges = 0; + nevents = 512; + + dp = open("/dev/poll", O_RDWR); + + if (dp == -1) { + ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "open(/dev/poll) failed"); + return NGX_ERROR; + } + + ngx_test_null(change_list, ngx_alloc(size, log), NGX_ERROR); + ngx_test_null(event_list, ngx_alloc(size, log), NGX_ERROR); + ngx_test_null(event_index, ngx_alloc(sizeof(ngx_event_t *) * nevents, log), + NGX_ERROR); + + timer_queue.timer_prev = &timer_queue; + timer_queue.timer_next = &timer_queue; + +#if !(USE_DEVPOLL) + ngx_event_actions.add = ngx_devpoll_add_event; + ngx_event_actions.del = ngx_devpoll_del_event; + ngx_event_actions.timer = ngx_devpoll_add_timer; + ngx_event_actions.process = ngx_devpoll_process_events; +#endif + + return NGX_OK; +} + + +/* NOT READY */ + +int ngx_devpoll_add_event(ngx_event_t *ev, int event, u_int flags) +{ + ngx_event_t *e; + ngx_connection_t *c; + + c = (ngx_connection_t *) ev->data; + + ev->oneshot = (flags & NGX_ONESHOT_EVENT) ? 1: 0; + + if (event == NGX_READ_EVENT) { + e = c->write; +#if (NGX_READ_EVENT != POLLIN) + event = POLLIN; +#endif + + } else { + e = c->read; +#if (NGX_WRITE_EVENT != POLLOUT) + event = POLLOUT; +#endif + } + + ngx_log_debug(ev->log, "poll fd:%d event:%d" _ c->fd _ event); + + if (e == NULL || e->index == NGX_INVALID_INDEX) { + event_list[nevents].fd = c->fd; + event_list[nevents].events = event; + event_list[nevents].revents = 0; + + event_index[nevents] = ev; + ev->index = nevents; + nevents++; + + } else { + event_list[e->index].events |= event; + ev->index = e->index; + } + + return ngx_devpoll_set_event(ev, event, EV_ADD | flags); +} + +/* NOT READY */ + +int ngx_devpoll_del_event(ngx_event_t *ev, int event, u_int flags) +{ + ngx_event_t *e; + + if (nchanges > 0 && ev->index < nchanges + && change_list[ev->index].udata == ev) + { + ngx_connection_t *cn = (ngx_connection_t *) ev->data; + ngx_log_debug(ev->log, "kqueue del event: %d: ft:%d" _ + cn->fd _ event); + + if (ev->index < --nchanges) { + e = (ngx_event_t *) change_list[nchanges].udata; + change_list[ev->index] = change_list[nchanges]; + e->index = ev->index; + } + + return NGX_OK; + } + + if (flags & NGX_CLOSE_EVENT) + return NGX_OK; + + return ngx_devpoll_set_event(ev, POLLREMOVE); +} + +/* NOT READY */ + +int ngx_devpoll_set_event(ngx_event_t *ev, int event) +{ + int n; + ngx_connection_t *c; + + c = (ngx_connection_t *) ev->data; + + ngx_log_debug(ev->log, "devpoll fd:%d event:%d" _ c->fd _ event); + + if (nchanges >= nevents) { + ngx_log_error(NGX_LOG_WARN, ev->log, 0, + "/dev/pool change list is filled up"); + + n = nchanges * sizeof(struct pollfd); + if (write(dp, change_list, n) != n) { + ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, + "write(/dev/poll) failed"); + return NGX_ERROR; + } + + nchanges = 0; + } + + event_list[nchanges].fd = c->fd; + event_list[nchanges].events = event; + event_list[nchanges].revents = 0; + + event_index[nchanges] = ev; + ev->index = nchanges; + +/* + if (flags == EV_ADD) + ev->index = nchanges; +*/ + + nchanges++; + + return NGX_OK; +} + + +int ngx_devpoll_process_events(ngx_log_t *log) +{ + int events, i; + u_int timer, delta; + ngx_event_t *ev; + struct dvpoll dvpoll; + struct timeval tv; + + if (timer_queue.timer_next != &timer_queue) { + timer = timer_queue.timer_next->timer_delta; +#if 1 + gettimeofday(&tv, NULL); + delta = tv.tv_sec * 1000 + tv.tv_usec / 1000; +#else + delta = ngx_msec(); +#endif + + } else { + timer = INFTIM; + delta = 0; + } + + ngx_log_debug(log, "devpoll timer: %d" _ timer); + + n = nchanges * sizeof(struct pollfd); + if (write(dp, change_list, n) != n) { + ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, "write(/dev/poll) failed"); + return NGX_ERROR; + } + + dvpoll.dp_fds = event_list; + dvpoll.dp_nfds = nevents; + dvpoll.dp_timeout = timer; + events = ioctl(dp, DP_POLL, &dvpoll); + + if (events == -1) { + ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, "ioctl(DP_POLL) failed"); + return NGX_ERROR; + } + + nchanges = 0; + + if (timer != INFTIM) { +#if 1 + gettimeofday(&tv, NULL); + delta = tv.tv_sec * 1000 + tv.tv_usec / 1000 - delta; +#else + delta = ngx_msec() - delta; +#endif + + } else { + ngx_assert((events != 0), return NGX_ERROR, log, + "ioctl(DP_POLL) returns no events without timeout"); + } + + ngx_log_debug(log, "devpoll timer: %d, delta: %d" _ timer _ delta); + + if (timer != INFTIM) { + if (delta >= timer) { + for ( ;; ) { + ev = timer_queue.timer_next; + + if (ev == &timer_queue || delta < ev->timer_delta) + break; + + delta -= ev->timer_delta; + ngx_del_timer(ev); + ev->timedout = 1; + if (ev->event_handler(ev) == NGX_ERROR) + ev->close_handler(ev); + } + + } else { + timer_queue.timer_next->timer_delta -= delta; + } + } + + for (i = 0; i < events; i++) { + + ngx_log_debug(log, "devpoll: %d: ev:%d rev:%d" _ + event_list[i].fd _ + event_list[i].events _ event_list[i].revents); + + + if (event_list[i].revents & POLLIN) { + c->read->ready = 1; + + if (c->read->oneshot) { + ngx_del_timer(c->read); + ngx_select_del_event(c->read, NGX_READ_EVENT, 0); + } + + if (c->read->event_handler(c->read) == NGX_ERROR) { + c->read->close_handler(c->read); + } + } + + if (event_list[i].revents & POLLOUT) { + c->write->ready = 1; + + if (c->write->oneshot) { + ngx_del_timer(c->write); + ngx_select_del_event(c->write, NGX_WRITE_EVENT, 0); + } + + if (c->write->event_handler(c->write) == NGX_ERROR) { + c->write->close_handler(c->write); + } + } + + if (event_list[i].revents & (POLLERR|POLLHUP|POLLNVAL)) { + ngx_log_error(NGX_LOG_ERR, log, ngx_errno, + "ioctl(DP_POLL) error on %d:%d", + event_list[i].fd, event_list[i].revents); + } + } + + return NGX_OK; +} + + +void ngx_devpoll_add_timer(ngx_event_t *ev, ngx_msec_t timer) +{ + ngx_event_t *e; + + ngx_log_debug(ev->log, "set timer: %d" _ timer); + + ngx_assert((!ev->timer_next && !ev->timer_prev), return, ev->log, + "timer already set"); + + for (e = timer_queue.timer_next; + e != &timer_queue && timer > e->timer_delta; + e = e->timer_next) + timer -= e->timer_delta; + + ev->timer_delta = timer; + + ev->timer_next = e; + ev->timer_prev = e->timer_prev; + + e->timer_prev->timer_next = ev; + e->timer_prev = ev; +}